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Okay, here's how it goes. We make one of the heroes our main guy – we upgrade the Spearman guild in the town, gather our troops, and hire caravans. With the second hero, we take two peasant huts and, on the second (or third) day, we venture out.
For the first two weeks, we completely clear the territory, avoiding particularly difficult monsters. The second hero gathers resources for the first, carries unnecessary artifacts to the town, and exchanges them for gold. We develop the town up to the Inquisitors, and we definitely build a Capitol. We can do this by the second week. If we're lucky, we can even build Knights.
By the end of the first month, we clear the graveyard and gather our forces in the town. We summon caravans, complete two quests, and receive reinforcements. We combine all the troops into one army and finish off all the monsters. We finish developing the town with the remaining resources.
1.5-2 months. We attack the Undead at the graveyard and get the Tome of Darkness. Then we can mess around with the Dwarf outpost. But it's better to take down the Necromancer first – we'll collect the entire set of Lion artifacts by completing the quest, and the help of Archangels and Inquisitors won't be superfluous. We gather in the town one last time, summon caravans, and upgrade the troops.
We decide whether to go to war with two heroes or one. We take the first and second Dwarf towns, depending on the situation.
After that, anything can happen. Most likely, we'll encounter a fairly powerful Dwarf, but we can definitely defeat him.
1) We use mass Light spells – it's better to use Stone Skin and Dodge – to buff the troops. With the Inquisitors, we use Prophecy on the Archers. It's also better to cast Haste beforehand. We shoot down the most dangerous units in the enemy army; it's better not to rush in, as the Haven forces are strong in defense.
2) We equip the Tome of Darkness and start messing with the enemies. Before that, it's still better to use Haste, and with the Inquisitors, use Prophecy on the Archers. The battles go quite easily.
3) We stay in the captured castles. Enemies can only reach us with Erlangs (Jarls, etc.). We take them down with Pikemen and then with a Catapult. We can level up the machines with a triple fire ballista, and if we're lucky with the Ring of Machines..., it will simply cut down the Dwarfs, maybe even distract their attention.
In this way, we gradually advance through the lands of the Dwarfs. There will only be two difficulties there: multi-turn portals and enemies crawling out of every crack, and, of course, Rolf. Who is a real cheater. We need to use all our abilities against him. We can try to repel his attack in the town.
After Rolf is defeated, everything goes smoothly – easily and simply. Well, defeating Wulstan and Hangwul in their towns is not such an impossible task.
Something like that.